>Xs4all offers a lot of technical advantages (e.g. being able to configure the ISP-side firewall to allow port 25 access).
Where I live there's no ISP-side firewall on any ISP, so that would not be an advantage at all.
Where I live there's no ISP-side firewall on any ISP, so that would not be an advantage at all.
The problem is that the market of tech enthusiasts is very small. At the KPN-scale, it is financially probably more attractive to streamline operations and to lose a few tech enthusiast subscribers than to keep several separate operations.
That said, Xs4all gave KPN the moral higher ground, plus testing grounds for new technology.